A Fifth-Grader Has Just Learned How to Do Some Simple

A fifth-grader has just learned how to do some simple programming on her dad's computer. Now, her class at school is learning programming and she gets gold stars for doing well. If the overjustification effect occurs, what is likely to happen this summer when she no longer gets stars for programming?

A) She will not work as hard as she did before she received the reward.
B) She will continue at about the same rate as before she was rewarded.
C) She will work harder than before she received the reward.
D) She will only work hard if there is a bigger reward later on.